ded452f1430f487194a6c9ee89d5519f16a83cd5
[babeltrace.git] / include / babeltrace / plugin / component-factory.h
1 #ifndef BABELTRACE_PLUGIN_COMPONENT_FACTORY_H
2 #define BABELTRACE_PLUGIN_COMPONENT_FACTORY_H
3
4 /*
5 * Babeltrace - Component Factory Class Interface.
6 *
7 * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 * SOFTWARE.
26 */
27
28 #include <babeltrace/plugin/component.h>
29 #include <babeltrace/plugin/source.h>
30 #include <babeltrace/plugin/sink.h>
31 #include <babeltrace/plugin/filter.h>
32 #include <babeltrace/plugin/plugin-system.h>
33
34 #ifdef __cplusplus
35 extern "C" {
36 #endif
37
38 /**
39 * Status code. Errors are always negative.
40 */
41 enum bt_component_factory_status {
42 /** General error. */
43 BT_COMPONENT_FACTORY_STATUS_ERROR = -128,
44
45 /** Invalid arguments. */
46 /* -22 for compatibility with -EINVAL */
47 BT_COMPONENT_FACTORY_STATUS_INVAL = -22,
48
49 /** Memory allocation failure. */
50 /* -12 for compatibility with -ENOMEM */
51 BT_COMPONENT_FACTORY_STATUS_NOMEM = -12,
52
53 /** I/O error. */
54 /* -5 for compatibility with -EIO */
55 BT_COMPONENT_FACTORY_STATUS_IO = -5,
56
57 /** No such file or directory. */
58 /* -2 for compatibility with -ENOENT */
59 BT_COMPONENT_FACTORY_STATUS_NOENT = -2,
60
61 /** Operation not permitted. */
62 /* -1 for compatibility with -EPERM */
63 BT_COMPONENT_FACTORY_STATUS_PERM = -1,
64
65 /** No error, okay. */
66 BT_COMPONENT_FACTORY_STATUS_OK = 0,
67 };
68
69 struct bt_component_factory;
70
71 /**
72 * Create a component factory.
73 *
74 * @returns An instance of component factory
75 */
76 extern
77 struct bt_component_factory *bt_component_factory_create(void);
78
79 /**
80 * Recursively load and register Babeltrace plugins under a given path.
81 *
82 * Path will be traversed recursively if it is a directory, otherwise only the
83 * provided file will be loaded.
84 *
85 * @param factory A component factory instance
86 * @param path A path to a file or directory
87 * @returns One of #bt_component_factory_status values
88 */
89 extern
90 enum bt_component_factory_status bt_component_factory_load(
91 struct bt_component_factory *factory, const char *path);
92
93 extern
94 enum bt_component_factory_status
95 bt_component_factory_register_source_component_class(
96 struct bt_component_factory *factory, const char *name,
97 bt_component_source_init_cb init);
98
99 extern
100 enum bt_component_factory_status bt_component_factory_register_sink_component_class(
101 struct bt_component_factory *factory, const char *name,
102 bt_component_sink_init_cb init);
103
104 extern
105 void bt_component_factory_destroy(struct bt_component_factory *factory);
106
107 #ifdef __cplusplus
108 }
109 #endif
110
111 #endif /* BABELTRACE_PLUGIN_COMPONENT_FACTORY_H */
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